%0 Book%A Denison, Robert H.%D 1967%T Ordovician vertebrates from Western United States / Robert H. Denison --%C [Chicago] :%I Field Museum of Natural History,%V v.16:no.6(1967)%! Ordovician vertebrates from Western United States /%L QE1 .F4 vol. 16 no. 5%K Ordovician%K Paleontology%K Vertebrates, Fossil%K West (U.S.)%G English%Z Caption title. --- "December 29, 1967." --- Fieldiana series has been published as Geological Series by Field Columbian Museum (1895-1909) and Field Museum of Natural History (1909-1943), and as Fieldiana: Geology by Chicago Natural History Mus%U http://www.biodiversitylibrary.org/item/25254%R 10.5962/bhl.title.5321